PhD student on the subject of Quantum-Safe Cryptanalysis (1.0 fte).

Centrum Wiskunde & Informatica (CWI) and Mathematical Institute of Leiden University have a joint vacancy in the Cryptology research group for a talented

PhD student

on the subject of Quantum-Safe Cryptanalysis (1.0 fte).

Job description

The CWI Cryptology group in Amsterdam and the Mathematical Institute of Leiden University offer a joint PhD position on the topic of Quantum-Safe Cryptanalysis. The goal is to advance the state of the art in quantum-safe cryptanalysis for the schemes that are currently being standardized. This ranges from improving our understanding in the fundamental computational problems underlying these important quantum-safe schemes, to improving the state of the art in cryptanalytic attacks, e.g., in more refined memory models.
The successful candidate will be working with Dr.Ir. Marc Stevens (CWI), Dr. Peter Bruin (Leiden) and Dr. Koen de Boer (Leiden).


Candidates are required to have a master’s degree in mathematics or in computer science.
Experience in one or more of these relevant background areas is an advantage: cryptography, algorithms, number theory, coding theory, and quantum algorithms. Some programming skills are expected.
Candidates are expected to have an excellent command of English.

Terms and conditions

The terms of employment are in accordance with the Dutch Collective Labour Agreement for Research Centres ("CAO-onderzoeksinstellingen"). The initial labour agreement will be for a period of 18 months. After a positive evaluation, the agreement will be extended by 30 months. The gross monthly salary, for a PhD student on a full time basis, is € 2,590 during the first year and increases to €3,318 over the four year period. Employees are also entitled to a holiday allowance of 8% of the gross annual salary and a year-end bonus of 8.33%. CWI offers attractive working conditions, including flexible scheduling and help with housing for expat employees.

Please visit our websites for more information about our terms of employment: and​​​​​

Information and application

All applications should include a detailed resume and motivation letter. The application deadline is 31 March 2023.

For more information about the vacancy, please contact Marc Stevens and/or Peter Bruin, and
For more information about CWI, please visit or watch our video about working at CWI

Diversity code

CWI encourages a diverse workforce: we endeavour to develop talent and creativity by bringing people from different backgrounds and cultures together. We recruit and select based on capabilities and talent. We strongly encourage everyone with the appropriate qualifications to apply for the vacancy, regardless of age, gender, origin, sexual orientation or physical abilities.

About CWI

Centrum Wiskunde & Informatica (CWI) is the Dutch national research institute for mathematics and computer science and is part of the Institutes Organisation of the Dutch Research Council (NWO). The mission of CWI is to conduct pioneering research in mathematics and computer science, generating new knowledge in these fields and conveying it to trade, industry, and society at large.

CWI is an internationally oriented institute, with 160 scientists from approximately 27 countries, an informal atmosphere and short lines of communication. We have an activity committee that organizes after-work activities and an informal women’s network.  

CWI is located at Science Park Amsterdam, the home of AMS-IX, that is presently developing into a major location of research in the physical sciences in The Netherlands, housing the sciences of the University of Amsterdam as well as several other national research institutes next to CWI.

About Research group

To find more information about the Cryptology group, please visit the group page.

About the Mathematical Institute of Leiden University
Leiden University was founded in 1575 and is one of the leading international research universities in Europe. It has seven faculties and a campus in both Leiden and The Hague.
The Faculty of Science, located at the Leiden Bio Science Park, is a world-class faculty where staff and students work together in a dynamic international environment. The research carried out at the Faculty of Science is very diverse, ranging from mathematics, information science, astronomy, physics, chemistry and bio-pharmaceutical sciences to biology and environmental sciences.
The Mathematical Institute is responsible for the research and education in mathematics and statistics at Leiden University. The institute has a strong international orientation. Its mission is to perform high-quality research at the frontiers of mathematical knowledge, and to educate future generations of mathematicians and statisticians in a friendly but challenging environment.

More information about Leiden University, the Faculty of Science and the Mathematical Institute: